foo.cc: In function 'int main()':
foo.cc:10:18: warning: array subscript is above array bounds [-Warray-bounds]
  a[1]=n/10%10;a[2]=n%10;
               ~~~^
foo.cc:11:6: warning: array subscript is above array bounds [-Warray-bounds]
  sort(a,a+3);
  ~~~~^~~~~~~
foo.cc:11:6: warning: array subscript is above array bounds [-Warray-bounds]
foo.cc:11:6: warning: array subscript is above array bounds [-Warray-bounds]
foo.cc:12:23: warning: array subscript is above array bounds [-Warray-bounds]
  cout<<a[0]<<a[1]<<a[2];
                       ^

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